tr:iterator does not work

[Zigc Junk]

I am trying to create dropdown list with the following code but the
dropdown list shows up empty. Is there anything wrong in my code? The
value is a java.util.List and I am sure it is not empty.

                <tr:iterator var="item" value="#{DocsBean.docTypes}">
                  <tr:selectItem text="#{item.docType}"
value="#{item.docType}"/>
                </tr:iterator>


thanks

Bill